Famous Patents
3M employee and church chorister Art Fry needed something to temporarily mark pages in his hymnal. He was in luck because his colleague, Spencer Silver, accidentally developed a glue that was too weak for other purposes. After initially discouraging consumer response, Post-it Notes became a hit in 1979.
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| Number | Title | Issue Date |
| 7819109 | Ignition apparatus Ignition apparatus includes high tension ignition cable. The cable is of low electrical resistance per unit length. A central core of the cable is formed of carbon fibre filaments. An insulating layer is provided around the core. A semiconductor layer is provided ar... | 10/26/2010 |
| 7712458 | Method and apparatus for raising the spark energy in capacitive ignition systems The present invention refers to an apparatus for raising the spark energy in capacitive ignition systems comprising at least one charge winding (L1) which via a first rectifier device (D1) charges a charge capacitor (C1) connected to the primary... | 05/11/2010 |
| 7665451 | Ignition apparatus Ignition apparatus 10 includes high tension ignition cable 56. The cable 56 is of low electrical resistance per unit length. A central core 100 of the cable 56 is formed of carbon fiber filaments. An insulating layer 110 is ... | 02/23/2010 |
| 7552724 | Multi-spark ignition system A multi-spark ignition system for an internal combustion engine includes ignition coils each of which is mounted on one of spark plugs of an engine, an energy storing circuit, switching elements that repeatedly discharge electric energy stored by the energy storing ... | 06/30/2009 |
| 7404396 | Multiple discharge ignition control apparatus and method for internal combustion engines In a multiple discharge ignition control apparatus, a battery, an energy storage coil and a first IGBT are connected in series. Further, the energy storage coil, a diode, a primary coil and a second IGBT are connected in series. The energy storage coil is connected ... | 07/29/2008 |
| 7355300 | Solid state turbine engine ignition exciter having elevated temperature operational capability A turbine engine ignition exciter circuit applies energy stored in the exciter tank capacitor to the load (igniter plug) through a thyristor type semiconductor switching device that minimizes leakage current at elevated operating temperatures. The semiconductor swit... | 04/08/2008 |
| 7293554 | Ignition coil driver device with slew-rate limited dwell turn-on A device to control the charging rate of an ignition coil for an internal combustion spark ignition engine. The device controls the turn-on rate of the primary coil by slew-rate limiting using switching devices and a Miller-effect capacitor in order to reduce second... | 11/13/2007 |
| 7121270 | Spark generation method and ignition system using same An ignition system providing power and duration controlled ignition spark, comprises a spark controller, first switching energy accumulator, storage capacitor, and second switching energy accumulator with an ignition coil. The ignition system utilizes dual means of ... | 10/17/2006 |
| 7100589 | Multi-spark type ignition system A multi-spark type ignition system for an internal combustion engine has a compact energy storage coil. The multi-spark type ignition system includes a energy storage coil, an energy storage capacitor, a first power transistor that switches on or off supply of elect... | 09/05/2006 |
| 7009368 | Voltage booster circuit having back-up circuit and battery voltage boosting method In a voltage booster circuit, a switching transistor turns on and off a flow of an electric current in a booster coil thereby to boost a voltage supplied form a d.c. power source. A back-up circuit is connected to the booster coil to store the boosted voltage as an ... | 03/07/2006 |
| 6805109 | Igniter circuit with an air gap Ignition systems of the kind used to ignite a difficult-to-ignite fuel oil by using energy stored in a capacitor at a breakdown for creating an ignition arc at the electrodes of a resistive arc probe, having a semiconductor resistive film across spark electrodes of ... | 10/19/2004 |
| 6701904 | Capacitive discharge ignition system with extended duration spark A capacitive discharge ignition system for an internal combustion engine comprises a converter transformer, an ignition transformer, a first triggerable switch S1, the primary winding of the ignition transformer and the storage capacitor being connected i... | 03/09/2004 |
| 6647974 | Igniter circuit with an air gap Ignition systems of the kind used to ignite a difficult-to-ignite fuel oil by using energy stored in a capacitor at a breakdown for creating an ignition arc at the electrodes of a spark plug, designed to preclude interference of contaminants with conducti... | 11/18/2003 |
| 6545415 | High efficiency high voltage low EMI ignition coil A high efficiency high voltage ignition coil with segmented high voltage bobbin (15) with the last few bays (16,17,18) having fewer secondary winding turns than the average and thicker flanges separating the bays, and further including an inductor (20) of... | 04/08/2003 |
| 6414468 | Electrical power derivation system A system for deriving electrical power from an engine includes a current inducing module that supplies current to a load such as a chargeable power source. The current inducing module preferably includes a magnet and coil arrangement. The magnet is associ... | 07/02/2002 |
| 6305365 | Ignition apparatus An ignition apparatus for a gasoline engine of independent cylinder type with low-voltage wiring has no distributor, and a CDI (Capacitor Discharge Ignitor) is employed to improve the ignition characteristic of lean mixture. In order to lengthen a dischar... | 10/23/2001 |
| 6140717 | Method and device for switching an inductor A method and device for switching an inductor are described. A first terminal of the inductor may be connected to ground via a first switching device. A second terminal of the inductor is always connected to a voltage power supply. A second inductor may b... | 10/31/2000 |
| 6052002 | Ignition systems having a series connection of a switch/inductor and a capacitor An ignition system has several charging circuits connected to a common input circuit and controlled by a common triggering unit to fire respective igniters. The input circuit has a voltage source connected across a first capacitor, which provides the outp... | 04/18/2000 |
| 5947093 | Hybrid ignition with stress-balanced coils An improved high energy high efficiency hybrid capacitive/inductive ignition system with one or coils Ti for internal combustion engines employing one or more energy storage capacitor means (4) shunted by diode means (9), with high leakage inductor means ... | 09/07/1999 |
| 5720252 | High power ignition assist for an engine A spark ignition system of an internal combustion engine has a first electrode and a second electrode spaced from each other operating at high voltages to produce a spark in a combustion zone of the engine. The construction of the system permits the forma... | 02/24/1998 |
| 5621278 | Ignition apparatus A charging circuit charges a first capacitor to a first voltage and a second capacitor, via a potential divider to a second voltage smaller than the first voltage. A trigger circuit repeatedly triggers a thyristor which discharges the second capacitor int... | 04/15/1997 |
| 5513618 | High performance ignition apparatus and method Apparatus and method for a plasma discharge for ignition in an internal combustion engine. A digital electronic system controls ignition performance and can provide an ignition discharge throughout an entire power stroke of a piston in a cylinder. The dis... | 05/07/1996 |
| 5361741 | Electronic ignition device for internal combustion engines An electronic ignition device for internal combustion engines is disclosed. The disclosed device employs a Hall sensor along with a Permanent Magnet (PM) mounted on a moving part of an engine to establish a reference point from which an Advance Firing Ang... | 11/08/1994 |
| 5220901 | Capacitor discharge ignition system with inductively extended discharge time A capacitor discharge ignition device for an internal combustion engine includes a booster coil 21 and a transistor 22 for generating a boosted voltage; a circuit 15A for generating a switching signal for the transistor in response to an ignition signal; ... | 06/22/1993 |
| 5215066 | Ignition apparatus for an internal combustion engine An LCDI-type ignition apparatus for an internal combustion engine includes first and second capacitors connected to an ignition coil and a voltage source for generating a charging voltage for the capacitors. The first capacitor is for producing an initial... | 06/01/1993 |
| 5193515 | Ignition system for an engine An ignition system for two ignition current circuits including a condenser to supply the ignition current to the plug. The ignition current circuits provide the ignition current to the plug alternately in response to an ignition timing signal so that the ... | 03/16/1993 |
| 5074274 | Ignition system for internal combustion engines An ignition system for internal combustion engines comprising an ignition coil (38), a power circuit (30) including a converter for converting the output of a battery (31) into a high voltage, a capacitor (37) arranged at the primary side of the ignition ... | 12/24/1991 |
| 5056496 | Ignition system of multispark type An ignition system of multispark type having an ignitability superior to that of a combination an ignition system of capacitor discharge type and a multispark system is disclosed. A first control signal is generated for turning on a first switching device... | 10/15/1991 |
| 5032969 | Turbine engine igniter exciter circuit An improved turbine engine igniter exciter circuit. An oscillator circuit drives the primary winding of a transformer for charging a capacitor to a predetermined voltage greater than the voltage required to sustain a spark discharge at an igniter but less... | 07/16/1991 |
| 4967718 | Ignition system for an internal combustion engine using thyristors An ignition system for an internal combustion engine comprises a direct-current supply, at least one spark plug, an ignition coil with a primary winding and a secondary winding for connection to the supply and to the at least one plug, respectively, a fir... | 11/06/1990 |
| 4964377 | Ignition system for an internal combustion engine In a first operative mode, the control unit first causes energy to be stored by the inductor and then connects the inductor to the capacitor so as to form a resonance circuit whose energy is discharged into the primary winding of the coil in order to gene... | 10/23/1990 |
| 4951625 | Internal combustion engine stop device An internal combustion engine stop device comprises a power generation winding for generating electric power corresponding to the rotation of an engine and charging a capacitor for an ignition winding; and a stop circuit for bringing the output of the pow... | 08/28/1990 |
| 4892080 | Ignition system for internal combustion engine A high-energy ignition system for an internal combustion engine in which both magnetic and electrical energy stored in an energy storage coil and in a capacitor are supplied to the primary winding of an ignition coil at a predetermined timing. When a firs... | 01/09/1990 |
| 4839772 | Capacitive discharge electronic ignition system for automobiles An apparatus for the generation of ignition voltage to a spark plug within an ingition system of an automobile includes an integrated circuit inverter for converting DC power source voltage into a high frequency voltage which is stepped-up by a transforme... | 06/13/1989 |
| 4699115 | Ignition apparatus for internal combustion engines In the ignition apparatus for internal combustion engines, the internal combustion engine drives a generator and the generator charges a battery. The battery is connected to a boosting transformer which is connected with a semiconductor switch. The semico... | 10/13/1987 |
| 4537174 | Output supply control apparatus for internal combustion engine magneto generator An output supply control apparatus controls the supply of an output from an internal combustion engine magneto generator to its loads so as to effectively utilize the magneto generator. The desired ignition energy is obtained by charging a discharge capac... | 08/27/1985 |
| 4345576 | Multi-spark CD ignition An improved multi-spark capacitor discharge (CD) ignition having independent circuits for charging and discharging the main capacitor, a flyback DC to DC converter, and an inductive filter interposed between the ignition coil and the main capacitor on one... | 08/24/1982 |
| 4245609 | Modulated AC ignition system An ignition system includes an alternating current power source which feeds a transformer having a primary winding, the primary winding being coupled to an electronic switch. The electronic switch intermittently interrupts current flowing in the primary w... | 01/20/1981 |
| 4223656 | High energy spark ignition system A pulse transformer produces sufficient energy at its secondary winding to initiate arcing of a spark gap in response to the interruption of current flow to its primary winding. Upon initial arcing of the spark gap, a charged capacitor is coupled across t... | 09/23/1980 |
| 4149508 | Electronic ignition system exhibiting efficient energy usage An automotive ignition system utilized multiple sparks for each cylinder ignition to ensure complete burning of the fuel mixture therein. To this end, a plurality of control signals are produced each time the engine breaker points or other timing apparatu... | 04/17/1979 |
